Re: Customize Conversion for Identifiers in Code Blocks

[Ranjit Jhala <rjhala-fWt/sZ2FBdz2fBVCVOL8/A@public.gmane.org>]

Thanks Matthew! I'll look into this. I'm guessing from this 

http://blog.jeci.fr/post/87994249356/adding-new-highlighting-language-into-pandoc

That I need to rebuild highlighting-Kate and pandoc? (Or can I specify the XML style file a command line parameter?)

> On Jan 18, 2015, at 6:22 AM, Matthew Pickering <matthewtpickering-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> 
> https://hackage.haskell.org/package/highlighting-kate
> 
> On Sun, Jan 18, 2015 at 2:22 PM, Matthew Pickering
> <matthewtpickering-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> Ah I think you will need to do something more complicated then.
>> 
>> Pandoc uses highlighting-kate[1] to do syntax highlighting.
>> 
>> Looking at the API, it seems like it should be possible to perform the
>> transformation you describe. I can try and figure it out later if you
>> need some help.
>> 
>> 
>>> On Sun, Jan 18, 2015 at 1:15 AM, Ranjit Jhala <rjhala-fWt/sZ2FBdz2fBVCVOL8/A@public.gmane.org> wrote:
>>> Thanks! I tried that and the filter indeed compiles but converting a single
>>> `CodeBlock` into a list of `CodeBlock` and `latex` blocks
>>> has the unfortunate effect of introducing line breaks everywhere (I think
>>> this is because a line break is introduced wherever a code block ends,
>>> right?)
>>> 
>>> 
>>>> On Saturday, January 17, 2015 at 4:45:54 PM UTC-8, Matthew Pickering wrote:
>>>> 
>>>> f :: Maybe Format -> Block -> [Block] should work fine.
>>>> 
>>>> 
>>>> https://hackage.haskell.org/package/pandoc-types-1.12.2.1/docs/Text-Pandoc-JSON.html
>>>> 
>>>> On Sun, Jan 18, 2015 at 12:44 AM, Ranjit Jhala <rjh...-fWt/sZ2FBdz2fBVCVOL8/A@public.gmane.org>
>>>> wrote:
>>>>> Hi Matthew,
>>>>> 
>>>>> The catch is that there's a bunch of other stuff in the `Block`.
>>>>> 
>>>>> That is, the special token is some substring of `s`
>>>>> 
>>>>> f :: Block -> Block
>>>>> f (CodeBlock _ s) = RawBlock (Format "latex")  ("\\MySpecialToken{" ++ s
>>>>> ++
>>>>> "}")
>>>>> f b = b
>>>>> 
>>>>> and I don't want to lose that. So I can write a function
>>>>> 
>>>>>    f :: Block -> [Block]
>>>>> 
>>>>> where each CodeBlock is expanded into a list of :
>>>>> 
>>>>>  `RawBlock (Format "latex")` of the kind above,
>>>>>  and the remaining, unchanged CodeBlock
>>>>> 
>>>>> But that causes problems with toJSONFilter as I can't pass in a
>>>>> transformation of the form
>>>>> 
>>>>>   [Block] -> [Block]
>>>>> 
>>>>> Because there is no instance of Walkable for [Block] ... :(
>>>>> 
>>>>> On Saturday, January 17, 2015 at 3:06:04 PM UTC-8, Matthew Pickering
>>>>> wrote:
>>>>>> 
>>>>>> You can write a filter ... f :: Block -> Block and have something like
>>>>>> the following.
>>>>>> 
>>>>>> f :: Block -> Block
>>>>>> f (CodeBlock _ s) = RawBlock (Format "latex")  ("\\MySpecialToken{" ++
>>>>>> s
>>>>>> ++ "}")
>>>>>> f b = b
>>>>>> 
>>>>>> Do you also plan to output to other formats? If so then "toJSONFilter"
>>>>>> can take a function of type "f :: Maybe Format -> Block -> Block"
>>>>>> where the first argument is the output format.
>>>>>> 
>>>>>> Does that make sense?
>>>>>> 
>>>>>> On Sat, Jan 17, 2015 at 9:05 PM, Ranjit Jhala <rjh...-fWt/sZ2FBdz2fBVCVOL8/A@public.gmane.org>
>>>>>> wrote:
>>>>>>> Hi,
>>>>>>> 
>>>>>>> I'd like to write a filter that runs on `CodeBlock` such that each
>>>>>>> identifier that begins
>>>>>>> with (say) "$$$mytoken" gets rendered in latex not as a
>>>>>>> 
>>>>>>>    \NormalTok{$$$mytoken}
>>>>>>> 
>>>>>>> but as
>>>>>>> 
>>>>>>>    \MySpecialToken{$$$mytoken}
>>>>>>> 
>>>>>>> Can anyone give me a hint as to how to proceed? The stumbling block
>>>>>>> is
>>>>>>> that
>>>>>>> it seems like
>>>>>>> the filter should "preserve" the type, so I can write a
>>>>>>> 
>>>>>>>    myFilter :: CodeBlock -> CodeBlock
>>>>>>> 
>>>>>>> But the `CodeBlock` type only allows strings -- presumably just
>>>>>>> replacing
>>>>>>> (substrings) of the form
>>>>>>> 
>>>>>>>    $$$mytoken
>>>>>>> 
>>>>>>> with
>>>>>>> 
>>>>>>>   \MySpecialToken{$$$mytoken}
>>>>>>> 
>>>>>>> will only cause the latter to then get "escaped" out during the final
>>>>>>> latex
>>>>>>> conversion?
>>>>>>> 
>>>>>>> Any pointers would be most welcome!
>>>>>>> 
>>>>>>> Thanks!
>>>>>>> 
>>>>>>> - Ranjit.
>>>>>>> 
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